Abstract: The present invention relates to a chlorine analyzing apparatus comprising mainly a reaction tube (1) of a double tube structure comprising an inner tube (11) for receiving a sample and an outer tube (14) for recovering hydrogen chloride; an electric furnace (9) having a reaction tube insertion hole into which the reaction tube is inserted, which is equipped with a heater disposed around the reaction tube insertion hole; and a titration cell (3) for receiving acetic acid as an electrolyte and subjecting hydrogen chloride withdrawn from the reaction tube (1) to coulometric titration, said analyzing apparatus further comprising a deodorization tube (4) disposed on a rear stage side of the titration cell (3) for thermally decomposing a vapor of acetic acid discharged from the titration cell, which is fitted into the electric furnace (9).

Abstract: A sample heating apparatus comprising:

Abstract: A constant-current polarization voltage detecting method includes step of feeding to a detecting electrode a predetermined minute current in a pulse form, and detecting sequentially a polarization voltage at each time of feeding the pulsating current, in an electrochemical analysis in solution. The polarization voltage is detected after a lapse of a predetermined time from the initiation of feeding the pulsating current at each time. A Karl Fischer's moisture content analyzing apparatus can utilize such a method.